Re: [HACKERS] Really slow query on 6.4.2

On Thu, 25 Mar 1999, Tom Lane wrote:

> Zeugswetter Andreas IZ5 <Andreas(dot)Zeugswetter(at)telecom(dot)at> writes:
> > 5. Actually postgresql has behaved in this manner because of certain
> > "bugs" in the optimizer. Recently a lot of those "bugs" have been
> > identified and "fixed", thus destroying the defacto rule based
> > behavior.
>
> That's a real good point --- I think we've already heard a couple of
> complaints about the new optimizer doing "silly" things that it didn't
> use to do.
>
> I repeat my proposal: CREATE TABLE should insert a default size (say
> about 1000 tuples) into pg_class.reltuples, rather than inserting 0.
> That way, the optimizer will only choose small-table-oriented plans
> if the table has actually been verified to be small by vacuum.

inserting 0 is an accurate number, not 1000 ...

Marc G. Fournier ICQ#7615664 IRC Nick: Scrappy
Systems Administrator @ hub.org
primary: scrappy(at)hub(dot)org secondary: scrappy(at){freebsd|postgresql}.org